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zohaib
Joined: 24 Aug 2007
Posts: 72
Helped: 1
Location: PAKISTAN
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 07 Oct 2008 10:03 led matrix display |
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hello forum !
i have bought an led matrix 8x8 display but couldn't find its datasheet how much current should be supplied to it i tested few leds by supplying 5v through 220ohm resistor they have enough brightness.according to this arrangement i am supplying 22mA to led is it ok ?or what should be prefereable current
thanks
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1229
Helped: 60
Location: Toronto, Canada
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| 07 Oct 2008 13:13 led matrix display |
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| 22mA should be fine, you'll need it bright because it'll dim when you start that 1:8 mux.
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manish12
Joined: 21 Nov 2006
Posts: 955
Helped: 29
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| 07 Oct 2008 13:24 Re: led matrix display |
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again the brightness will affect by the speed of scanning ,more fast you will get less bright display , slow scanning more brightness !
you can first check the display with more than 220E ok , after this according to the level of brightness adjust it .
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